Patents by Inventor Yoshihiko Tsuchiya

Yoshihiko Tsuchiya has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Fuel pump control device
    Patent number: 7021294
    Abstract: To provide a fuel pump control device allowing a fuel pump having a small capacity to feed a sufficient amount of fuel to an internal combustion engine. During running of a vehicle at a low speed (for example, less than 2,0 km/hr), pulsed drive voltages are intermittently supplied to a fuel pump in accordance with each opening/closing of a thyristor on the basis of ignition pulses of the engine. In this way, the fuel pump repeats discharge operation at a relatively long cycle in synchronization with the pulsed drive voltages. During running of the vehicle at a high speed, a drive voltage is continuously supplied (that is, a DC voltage is supplied) from a power supply line to the fuel pump, whereby the fuel pump repeats discharge operation at a cycle with a short self-excitation state.
    Type: Grant
    Filed: April 17, 2003
    Date of Patent: April 4, 2006
    Assignee: Exelixis, Inc.
    Inventors: Takao Yamamoto, Ryota Umetani, Yoshihiko Tsuchiya, Kenichi Nishizawa
  • Fuel pump control device
    Publication number: 20030188719
    Abstract: To provide a fuel pump control device allowing a fuel pump having a small capacity to feed a sufficient amount of fuel to an internal combustion engine. During running of a vehicle at a low speed (for example, less than 2.0 km/hr), pulsed drive voltages are intermittently supplied to a fuel pump in accordance with each opening/closing of a thyristor on the basis of ignition pulses of the engine. In this way, the fuel pump repeats discharge operation at a relatively long cycle in synchronization with the pulsed drive voltages. During running of the vehicle at a high speed, a drive voltage is continuously supplied (that is, a DC voltage is supplied) from a power supply line to the fuel pump, whereby the fuel pump repeats discharge operation at a cycle with a short self-excitation state.
    Type: Application
    Filed: April 17, 2003
    Publication date: October 9, 2003
    Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHA
    Inventors: Takao Yamamoto, Ryota Umetani, Yoshihiko Tsuchiya, Kenichi Nishizawa
  • Fuel pump control device
    Patent number: 6553972
    Abstract: To provide a fuel pump control device allowing a fuel pump having a small capacity to feed a sufficient amount of fuel to an internal combustion engine. During running of a vehicle at a low speed (for example, less than 2,0 km/hr), pulsed drive voltages are intermittently supplied to a fuel pump in accordance with each opening/closing of a thyristor on the basis of ignition pulses of the engine. In this way, the fuel pump repeats discharge operation at a relatively long cycle in synchronization with the pulsed drive voltages. During running of the vehicle at a high speed, a drive voltage is continuously supplied (that is, a DC voltage is supplied) from a power supply line to the fuel pump, whereby the fuel pump repeats discharge operation at a cycle with a short self-excitation state.
    Type: Grant
    Filed: December 7, 1999
    Date of Patent: April 29, 2003
    Assignee: Honda Giken Kogyo Kabushiki Kaisha
    Inventors: Takao Yamamoto, Ryota Umetani, Yoshihiko Tsuchiya, Kenichi Nishizawa